vtkHyperOctree->DeepCopy() provides shallow copy.
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
As reported on vtkUsers mailing list: http://www.vtk.org/pipermail/vtkusers/2013-January/127166.html
The DeepCopy() method of vtkHyperOctree actually provides a shallow copy.